Sums of Integers, Squares & Cubes (Edexcel A-Level Further Mathematics): Quizzes

$\frac{n(n+1)}{2}$

$\frac{n(n+1)(2n+1)}{6}$

$\left[\frac{n(n+1)}{2}\right]^2$

$385$

$36$

$225$

$\sum_{r=1}^8 r + \sum_{r=1}^8 r^2$

$240$

$2\sum_{r=1}^{5} r^3 + 3\sum_{r=1}^{5} r$

$495$